JP2962314B1 - Facsimile machine - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To prevent deterioration of communication performance in a facsimile machine 1. SOLUTION: A paper feed unit 5 for feeding paper for image formation, an image forming means, and a document reading unit are arranged between left and right side surfaces of a main lower case 1a. The cooling fan 43 is arranged on the right side in the main lower case 1a, the handset 64 is arranged on the left side of the main lower case 1a, and the NCU board 14 is arranged on the left rear side in the main lower case 1a. The fan 43 will be largely separated from the NCU board 14 and the handset 64, and the adverse effect of the magnetic field from the speaker 66 and the cooling fan 43 will not affect the handset 64 and the NCU board 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a laser printer,
The present invention relates to a configuration of a facsimile apparatus having an image forming unit such as an electrostatographic type.

[0002]

2. Description of the Related Art Conventionally, a facsimile apparatus has been provided with a network control unit (NCU) for communication via a telephone line and a handset for talking with another facsimile apparatus or telephone. Further, a speaker for notifying a user of reception from another facsimile apparatus is housed in a main body case of the facsimile apparatus.

On the other hand, an image forming means for forming an image of the received image data on a sheet for recording is arranged in a main body case of the facsimile apparatus, and heat generated from this image forming means is transferred to the outside of the main body case. Some were provided with a cooling fan for discharge.

[0004]

However, in the speaker, a strong magnetic field is always emitted from a permanent magnet (magnet) approaching a coil for driving the diaphragm, and the motor part of the cooling fan is also provided. Since a strong magnetic field is generated during operation, when these components are arranged near the NCU or the handset, there is a problem that a communication signal is greatly disturbed and transmission and reception operations are disturbed.

[0005] The present invention has been made to solve this problem, and has as its object to provide a facsimile apparatus capable of performing stable transmission and reception.

[0006]

In order to achieve this object, a facsimile apparatus according to the first aspect of the present invention includes a sheet feeding unit for feeding a sheet for image formation, an image forming unit, and a document reading unit. The unit and the network control unit are provided in the main body case, and in plan view,
The speaker and the cooling fan are arranged on one side in the main body case, and the handset is arranged on the other side of the main body case.

According to a second aspect of the present invention, there is provided a facsimile apparatus according to the first aspect, wherein the network control unit is provided in a main body case far away from a location where the speaker and the cooling fan are arranged. It is arranged. In a facsimile apparatus according to a third aspect of the present invention, in the facsimile apparatus according to the first or second aspect, the image forming means includes a photosensitive drum and a developing device for forming a toner image on the photosensitive drum. It comprises a built-in process unit, an exposure unit for forming an electrostatic latent image on the photosensitive drum, and a fixing unit for heating and fixing the toner image transferred to the paper, and a cooling unit beside the fixing unit. Juan is arranged.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. 1 is a perspective view of main components of the facsimile machine, FIG. 2 is a schematic side sectional view of the facsimile machine, FIG. 3 is a partially cutaway plan view of the facsimile machine, FIG. 4 is a control board in a main body case, an NCU board, It is a top view which shows arrangement | positioning of a cooling fan, a speaker, etc.

The main body case of the facsimile apparatus 1 is shown in FIG.
As shown in FIG. 1, an image forming unit including a scanner unit 2, a process unit 3, and a fixing unit 4, and a sheet feeding unit 5 for supplying a sheet P for forming an image.
And lower main case 1a made of synthetic resin
And an upper case 1b made of a synthetic resin pivotally attached to a side rear portion of the main lower case 1a so as to cover an upper side of the main lower case 1a and to be able to pivot up and down greatly in the front,
A document reading unit 6 and a document feed table 7 can be placed on the upper surface of the upper case 1b, and the upper side of the document reading unit 6 is detachably covered by an operation panel 8.

A drive system unit 9 including a process motor 3, a fixing unit 4, and a drive motor for transmitting power to the paper feed unit 5 and a gear train is provided on the left side of the main lower case 1a. In a storage recess (not shown). Further, a control board 11, a low-voltage power supply board 12, a high-voltage power supply board 13, and other telephone devices and facsimile devices via a telephone line are provided above a bottom cover 10 made of a metal plate that covers the lower surface of the main lower case 1a. An NCU (network control unit) board 14 and the like for enabling conversation and facsimile data transmission and reception between them are arranged. That is, as shown in FIG. 4, in plan view, the high-voltage power supply board 13 for the charger 28 and the like of the process unit 3 is disposed at a position on the front right side of the bottom cover 10, and an electric power is provided on the left side of the position near the rear end of the bottom cover 10. The NCU board 14 is fixed to a supporting plate 14a which is also connected and erected as a partition plate, the low-voltage power supply board 12 is arranged near the NCU board 14, and the control board 11 is arranged on the right side near the rear end of the bottom cover 10. I have.

The leading end of the sheet P set in a state of being stacked in the feeder unit case 5a of the sheet feeding unit 5 is supported by a support plate 15 with an urging spring 15a in the feeder unit case 5a.
Is pressed toward the paper feed roller 16, and is separated one by one by the paper feed roller 16 and the separation pad 17, which rotate by being transmitted with power from the drive system unit 9. The separated sheet P is fed to the upper side of the process unit 3 by a pair of upper and lower registration rollers 18 and 19, and the sheet P on which an image is formed by toner on the surface of the process unit 3 is transferred to the fixing unit 4. After the image is fixed by the heating roller 21 and the pressing roller 22, the image is discharged from the paper discharge port 20 and discharged onto a discharge tray (not shown).

A scanner unit 2 is provided at a position below a process unit 3 which is disposed substantially at the center of the main lower case 1a having a box shape having an open top in a plan view.
It is fixed to the stay part integrally formed on the upper surface side of the bottom plate part by a screw or the like. As shown in FIG. 2, a scanner unit 2 as an exposure unit has a laser emitting unit, a polygon mirror 23,
A lens 24, a reflecting mirror 25 and the like are arranged, and the upper support plate 2a
The laser beam is applied to the outer peripheral surface of the photosensitive drum 26 in the process unit 3 by passing through a glass plate that covers a horizontally long scanner hole formed so as to extend along the axis of the photosensitive drum 26. It is configured.

The process unit 3 includes the photosensitive drum 26 and the transfer roller 2 which rotates while being in contact with the upper surface thereof.
7, a scorotron type charger 28 disposed below the photosensitive drum 26, a developing roller 29 and a supply roller 3 disposed upstream of the photosensitive drum 26 in the sheet feeding direction.
0, a developer (toner) supply unit disposed upstream thereof, that is, a detachable toner cartridge 31, a cleaning device 32 disposed downstream of the photosensitive drum 26, and the like. An electrostatic latent image is formed on the outer peripheral surface of the photosensitive drum 26 by scanning a laser beam from the scanner unit 2 on the charged layer formed by the charger 28. The developer (toner) in the toner cartridge 31 is agitated by a stirrer (not shown) and released, and then carried on the outer peripheral surface of the developing roller 29 via the supply roller 30. The thickness is regulated. The electrostatic latent image on the photosensitive drum 26 is visualized by the developer adhering from the developing roller 29, and the transfer roller 27 and the photosensitive drum 2
6 is transferred to a sheet P passing between the sheets 6. Then, the developer remaining on the photosensitive drum 26 is collected by the cleaning device 32.

The process unit 3 is formed into a cartridge by being incorporated in a synthetic resin case.
The cartridge-formed process unit 3 is detachably mounted on the main lower case 1a. The document reading unit 6 disposed on the upper case 1b includes a horizontally long contact type image sensor (CIS) 34 disposed in a unit case 42, as shown in FIGS.
Document separation feed roller 3 arranged near document feed table 7
5 and a pair of transport rollers 36 disposed on the upstream and downstream sides of the transport with the contact type image sensor 34 interposed therebetween,
37, a drive motor 40 for driving the rollers 35, 36, and 37, and a drive motor unit 39 in which a gear train 41 is housed in a frame. An original (not shown) that is fed one by one is configured so that an image of the original is read when the lower surface passes between the pressing plate 38 arranged in a downwardly convex curved shape of white and the upper surface of the CIS 34. .

As shown in FIG. 6, a storage section 44 for storing a cooling fan 43 for blowing air to the outside of the case is provided at a front right portion of the main lower case 1a.
Ventilation duct 4 extending in a direction perpendicular to the direction in which paper P passes
5 are formed in communication with each other. In this case, as shown in FIG. 2 and FIG. 6, a process of forming the upper surface plate portion 45a of the ventilation duct 45 into a substantially V shape with a downward cross section and disposing the upper surface plate portion 45a on the upper surface side of the main lower case 1a. The heat of the heating roller 21 in the fixing unit 4 located between the unit 3 and the fixing unit 4 is not transmitted to the process unit 3 side. A partition plate 46 made of a synthetic resin plate or the like is provided between the lower ends of the substantially V-shaped upper surface plate portion 45a having a downward cross section.
, And a portion surrounded by these members becomes a ventilation duct 43.

FIGS. 4, 6, 7A and 7
As shown in FIG. 8B and FIG. 8, a large number of air suction holes 50a, 50b, 51 are formed in the rear end surface of the main lower case 1a (the portion facing the NCU substrate 14), the rear upper surface, and the left side surface. On the right side of the main lower case 1a in which the cooling fan 43 is arranged, a large number of blowout holes 52 are formed. On the other hand, air suction holes 53a, 53b, Many 53b are drilled. Also, as shown in FIGS. 2, 5, and 6,
Inside the main lower case 1a, a ventilation hole 54 is provided below the mounting portion of the paper feeding unit 5, and ventilation holes 55a and 55b are provided at locations facing the rear surface of the process unit 3, and at the location of the upper surface plate portion 45a. The ventilation hole 56 and the cooling fan 4
A ventilation hole 57 is formed in a wall or the like that partitions the third storage section 44. As shown in FIGS. 2, 4, 7 (a) and 7 (b), an opening is formed on one side of the rear side of the main lower case 1a (in the embodiment, on the right side). An optional board such as an additional RAM (randomly readable and writable memory) board 60 or a LAN (local area network) board 61 is made detachable from the opening 59, and the opening 59 has an inverted L-shape in side view. It is configured such that it can be detachably opened by the cover body 62 having a shape of a letter.

In the present invention, a handset 64 for conversing with another telephone device is provided on a receiving stand 6 projecting outward from the left side of the main lower case 1a.
5 and is fixed to the rear side of the right side surface in the main lower case 1a. That is,
In the present invention, the cooling fan 43 and the speaker 66, which generate a large magnetic field in the motor unit and the magnet unit during operation,
The main lower case 1a as a main body case is disposed on one side in plan view (the right side in FIG. 4 in the embodiment), and the NCU substrate 14 and the handset 64 that are easily affected by the magnetic field during communication are connected to the main lower case 1a. The other side (FIG. 4 in the embodiment)
At the left).

FIG. 9 is a block diagram showing a control system of the facsimile apparatus 1 to which the present invention is applied. The facsimile apparatus 1 sets various processing operations, reads a document image by the document reading unit 6, converts the document image into transmission data, and transmits the transmission data in response to various commands input from the user through the operation panel 8. In addition to executing encoding, transmission and reception of facsimile data, decoding of received data, recording of the decoded facsimile data on the paper P by the image forming means, and a document by a CIS (contact image sensor) 34 of the document reading unit 6 Paper P by reading and image forming means
A copy processing function of forming an image on a sheet, a printer processing function of printing the transmitted data on a sheet P based on data transmission from an external device such as a personal computer (not shown), and using the document reading unit 6 A scanner processing function of transmitting the read image data to the external device is also provided.

In order to perform these operations, the facsimile apparatus 1 includes an operation panel 8, an original reading unit 6, a laser light scanner unit 2, a process unit 3, and a fixing unit 4. A CPU 67 mounted thereon to execute various controls and calculations, a ROM 68 storing a control program, a RAM 69 partially used as a reception buffer memory 69a, an NCU board 14, and other facsimile machines via the NCU board 14. A modem 70 for transmitting and receiving facsimile data, a handset 64 for talking with another telephone device, a speaker 66 for calling, and power to each drive unit of the image forming means. Drive unit 9 provided with a stepping motor for performing
A low-voltage power supply board 12 for supplying low-voltage power to
The process unit 3 includes a high-voltage power supply board 13 for supplying high-voltage power to the charger 28, a cooling fan 43 for discharging cooling air out of the machine, and a bus line 71 for connecting these.

The additional RAM board 60 for increasing the amount of memory and the LAN board for constructing a network for transmitting data to and from external devices such as a plurality of computers are provided at the request of the user. It is an optional device that can be added. In the above configuration, when the power is turned on, power is supplied to each of the substrates 11, 12, 13, and 14, and various controls can be executed, while the cooling fan 43 is rotationally driven. Then, the cooling air sucked from the air suction holes 50a and 50b such as the rear end surface of the main lower case 1a passes through the surface portions of the NCU board 14, the control board 11, and the low-voltage power supply board 12, and then the scanner unit 2 While passing between the lower surface side and the bottom cover 10 and reaching the front of the main lower case 1a, the ventilation hole 54 below the mounting portion of the paper feeding unit 5 and the ventilation hole at a position facing the rear surface of the process unit 3. The cooling air that has passed between the upper surface of the process unit 3 and the upper case 1b via the upper and lower cases 55a and 55b collects in the storage portion 44 through the ventilation holes 56 and the ventilation holes 57 at the upper surface plate portion 45a. Juan 43
Is released outside the body case. Thus, the heat of the heating roller 21 of the fixing unit 4 does not adversely affect the process unit 3.

The image forming means comprises a main lower case 1a
In the case of a front-out system (front through-out path) in which the paper P is discharged from the paper supply unit 5 disposed at the rear of the printer 1 to the front end of the main lower case 1a via the process unit 3 and the fixing unit 4, a high-temperature heat source is used. Fusing unit 4
Is arranged on the front end side of the main lower case 1a, so that the cooling fan 43 for discharging the heat can also be arranged at a position closer to the front of the main lower case 1a (a position closer to the heat source). It is preferable for improving the cooling effect. On the other hand, the NCU board 14 and the handset 64
Is preferably located as far as possible from the position of the cooling fan 43, so that, in plan view of the main lower case 1 a, the cooling fan 43 is disposed at a position near the right front portion, and the NCU substrate 14 The handset 64 may be arranged on the left side.

Since the speaker 66 should also be arranged as far as possible from the NCU board 14 and the handset 64, in this embodiment, it is arranged at a position closer to the rear of the right side of the main lower case 1a. If there is an appropriate space near the front portion of the right side of 1a, the speaker 66 may be disposed at the front in that space. With this arrangement, there is an effect that a call signal or a conversation from another facsimile apparatus uttered by the speaker 66 can easily reach the ear of a user located in front of the facsimile apparatus 1.

When the paper on which an image is formed passes through the image forming means and makes a U-turn in the rearward direction on the upper surface side of the main body case, the image forming means is disposed at a position closer to the rear of the main body case. In case, cooling fan 4
The arrangement position of 3 is also arranged at the rear side portion of the side surface in the main body case.

[0024]

As described above, the facsimile apparatus according to the first aspect of the present invention has a paper feed unit for feeding paper for image formation, an image forming means, a document reading unit, a network, A control unit is provided in a main body case, and a speaker and a cooling fan are arranged on one side in the main body case and a handset is arranged on the other side of the main body case in plan view.

According to this structure, the paper feeding unit, the image forming means, and the document reading unit are arranged between the left and right side surfaces of the main body case. As a result, the speaker and the cooling fan arranged on one side in the main body case are provided. And the distance from the handset placed on the other side of the main body case is greatly separated, so that the adverse effect of the magnetic field generated from the speaker and the cooling fan does not affect the handset, and the communication performance can be reliably prevented from deteriorating. It has the effect of being able to.

According to a second aspect of the present invention, in the facsimile apparatus according to the first aspect, the network control unit is disposed in a main body case far away from a location where the speaker and the cooling fan are disposed. Therefore, the network control unit for controlling communication is also separated from the speaker and the cooling fan, and is not adversely affected by the magnetic field generated from the speaker and the cooling fan. This has the effect that it can be prevented.

According to a third aspect of the present invention, in the facsimile apparatus according to the first or second aspect, the image forming means includes a photosensitive drum and a developing device for forming a toner image on the photosensitive drum. It comprises a built-in process unit, an exposure unit for forming an electrostatic latent image on the photosensitive drum, and a fixing unit for heating and fixing the toner image transferred to the paper, and a cooling unit beside the fixing unit. Since the fan is disposed, the heat generated from the fixing unit can be quickly discharged to the outside of the main body case by the cooling fan while eliminating the adverse effect of the magnetic field.

[Brief description of the drawings]

FIG. 1 is a perspective view of main components of a facsimile machine.

FIG. 2 is a schematic side sectional view of the facsimile machine.

FIG. 3 is a partially cutaway plan view of the facsimile apparatus.

FIG. 4 is a plan view of a bottom cover that covers a lower surface of a main lower case.

FIG. 5 is a plan view of a main lower case.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7A is a perspective view of a rear portion of the facsimile machine,
(B) is a perspective view of the rear part of the facsimile apparatus with the cover removed.

FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 7 (a).

FIG. 9 is a functional block diagram of a control unit.

[Explanation of symbols]

 P paper 1 Facsimile machine 1a Main lower case 1b Upper case 2 Scanner unit 3 Process unit 4 Fixing unit 5 Paper feed unit 6 Document reading unit 10 Bottom cover 14 NCU board 21 Heating roller 26 Photoconductor drum 43 Cooling fan 45a Ventilation duct Plate part 64 for handset 66 speaker

Claims (3)

(57) [Claims] A main body case provided with a paper feed unit for feeding paper for image formation, an image forming means, a document reading unit, and a network control unit;
A facsimile apparatus in which a speaker and a cooling fan are arranged on one side in a main body case and a handset is arranged on the other side of the main body case in plan view. 2. The facsimile apparatus according to claim 1, wherein the network control unit is disposed in a main body case far away from a position where the speaker and the cooling fan are disposed. 3. A process unit including a photoconductor drum and a developing device for forming a toner image on the photoconductor drum, an exposure unit for forming an electrostatic latent image on the photoconductor drum, and The facsimile apparatus according to claim 1, further comprising a fixing unit configured to heat and fix the toner image transferred to the sheet, wherein a cooling fan is arranged on a side of the fixing unit.